Tests for unwinder of x86*.

Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>

1 files changed, 115 insertions, 0 deletions

diff --git a/tests/backtrace-subr.sh b/tests/backtrace-subr.sh
new file mode 100644
index 00000000..39d40b3f
--- /dev/null
+++ b/tests/backtrace-subr.sh
@@ -0,0 +1,115 @@
+# Copyright (C) 2013 Red Hat, Inc.
+# This file is part of elfutils.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# elfutils is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. $srcdir/test-subr.sh
+
+# Verify one of the backtraced threads contains function 'main'.
+check_main()
+{
+  if grep -w main $1; then
+    return
+  fi
+  echo >&2 $2: no main
+  false
+}
+
+# Without proper ELF symbols resolution we could get inappropriate weak
+# symbol "gsignal" with the same address as the correct symbol "raise".
+# It was fixed by GIT commit 78dec228b3cfb2f9300cd0b682ebf416c9674c91 .
+# [patch] Improve ELF symbols preference (global > weak)
+# https://lists.fedorahosted.org/pipermail/elfutils-devel/2012-October/002624.html
+check_gsignal()
+{
+  if ! grep -w gsignal $1; then
+    return
+  fi
+  echo >&2 $2: found gsignal
+  false
+}
+
+# Verify the STDERR output does not contain unexpected errors.
+# In some cases we cannot reliably find out we got behind _start as some
+# operating system do not properly terminate CFI by undefined PC.
+# Ignore it here as it is a bug of OS, not a bug of elfutils.
+check_err()
+{
+  if [ $(egrep -v <$1 'dwfl_thread_getframes: (No DWARF information found|no matching address range)$' \
+         | wc -c) \
+       -eq 0 ]
+  then
+    return
+  fi
+  echo >&2 $2: neither empty nor just out of DWARF
+  false
+}
+
+check_all()
+{
+  bt=$1
+  err=$2
+  testname=$3
+  check_main $bt $testname
+  check_gsignal $bt $testname
+  check_err $err $testname
+}
+
+check_unsupported()
+{
+  err=$1
+  testname=$2
+  if grep -q ': Unwinding not supported for this architecture$' $err; then
+    echo >&2 $testname: arch not supported
+    exit 77
+  fi
+}
+
+check_core()
+{
+  arch=$1
+  testfiles backtrace.$arch.{exec,core}
+  tempfiles backtrace.$arch.{bt,err}
+  echo ./backtrace ./backtrace.$arch.{exec,core}
+  testrun ${abs_builddir}/backtrace -e ./backtrace.$arch.exec --core=./backtrace.$arch.core 1>backtrace.$arch.bt 2>backtrace.$arch.err || true
+  cat backtrace.$arch.{bt,err}
+  check_all backtrace.$arch.{bt,err} backtrace.$arch.core
+}
+
+# Backtrace live process.
+# Do not abort on non-zero exit code due to some warnings of ./backtrace
+# - see function check_err.
+check_native()
+{
+  child=$1
+  tempfiles $child.{bt,err}
+  (set +ex; testrun ${abs_builddir}/backtrace --backtrace-exec=${abs_builddir}/$child 1>$child.bt 2>$child.err; true)
+  cat $child.{bt,err}
+  check_unsupported $child.err $child
+  check_all $child.{bt,err} $child
+}
+
+# Backtrace core file.
+check_native_core()
+{
+  child=$1
+  core="core.`ulimit -c unlimited; set +ex; testrun ${abs_builddir}/$child --gencore; true`"
+  # Do not abort on non-zero exit code due to some warnings of ./backtrace
+  # - see function check_err.
+  tempfiles $core{,.{bt,err}}
+  (set +ex; testrun ${abs_builddir}/backtrace -e ${abs_builddir}/$child --core=$core 1>$core.bt 2>$core.err; true)
+  cat $core.{bt,err}
+  check_unsupported $core.err $child-$core
+  check_all $core.{bt,err} $child-$core
+}